ASTM E923-97(2008)
(Specification)Standard Specification for Glass Westergren Tube, Reusable
Standard Specification for Glass Westergren Tube, Reusable
ABSTRACT
This specification covers the design and dimensional requirements for reusable glass Westergren tubes that measure the erythrocyte sedimentation rate (ESR), which is the suspension stability, or amount of settling after a specified time, of red blood cells in diluted, anti-coagulated human blood. The tubes shall be fabricated from Type I, Class B borosilicate glass, or Type II soda lime glass. Tubes shall comply with requirements for graduation line length and numbering, marking permanency, grinding bevel, and workmanship. The tubes should also pass a pigmentation and amber stain test.
SCOPE
1.1 This specification describes requirements for a tube that measures the erythrocyte sedimentation rate (ESR). ESR is the suspension stability of red cells in diluted, anti-coagulated human blood.
1.1.1 The use of the term “rate” is, strictly speaking, not correct. The test measures the amount of settling of red cells after a specified time.
1.2 The tubes are used together with a special rack to ensure they remain in a vertical position during the test.
1.3 This specification includes many dimensional requirements that are, for the most part, in agreement with the British Standards Institution, German Standards Institute, International Committee for Standardization in Haematology, and the National Committee for Clinical Laboratory Standards publications on Westergren tubes. The clinical procedure using the tube described in this specification is known as the “Westergren Method.”
1.4 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.
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Designation:E923 −97(Reapproved 2008)
Standard Specification for
Glass Westergren Tube, Reusable
This standard is issued under the fixed designation E923; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. A
superscript epsilon (´) indicates an editorial change since the last revision or reapproval.
1. Scope E1157 Specification for Sampling and Testing of Reusable
Laboratory Glassware
1.1 This specification describes requirements for a tube that
measures the erythrocyte sedimentation rate (ESR). ESR is the
3. Terminology
suspension stability of red cells in diluted, anti-coagulated
3.1 Definitions of Terms Specific to This Standard:
human blood.
3.1.1 reusable—capable of being used again.
1.1.1 The use of the term “rate” is, strictly speaking, not
correct. The test measures the amount of settling of red cells 3.1.2 tube—the word “tube” rather than “pipet” is used to
after a specified time.
describe this instrument. The word “pipet” should be reserved
for volume-measuring instruments thus designated. A tube
1.2 The tubes are used together with a special rack to ensure
used for measurements of blood sedimentation rate is not a
they remain in a vertical position during the test.
volume measuring instrument. In this connection, misunder-
1.3 This specification includes many dimensional require-
standing can occur when a Westergren “tube” is described as a
ments that are, for the most part, in agreement with the British
“pipet.”
Standards Institution, German Standards Institute, Interna-
3.1.3 Westergren—The surname of the individual respon-
tional Committee for Standardization in Haematology, and the
sible for the design of the Westergren tube and the method of
National Committee for Clinical Laboratory Standards publi-
use.
cations on Westergren tubes. The clinical procedure using the
tube described in this specification is known as the “Wester-
4. Classification
gren Method.”
4.1 This specification covers a tube that is intended to be
1.4 This standard does not purport to address all of the
used until it is no longer considered functional for the purpose
safety concerns, if any, associated with its use. It is the
intended.The specification is specifically written for a reusable
responsibility of the user of this standard to establish appro-
item and is not to be confused with a disposable tube that is
priate safety and health practices and determine the applica-
described in other published standards.
bility of regulatory limitations prior to use.
5. Materials
2. Referenced Documents
2 5.1 The tubes made to this specification shall be fabricated
2.1 ASTM Standards:
from borosilicate glass, Type I, Class B; or soda lime glass,
E438 Specification for Glasses in Laboratory Apparatus
Type II, in accordance with Specification E438.
E920 Specification for Commercially Packaged Laboratory
Apparatus
6. Dimensions, Mass, and Permissible Variations
E921 Specification for Export Packaged Laboratory Appa-
6.1 Design—The Westergren tube shall be made of thick-
ratus
walled glass tubing. It shall be of one-piece construction,
E1133 Practice for Performance Testing of Packaged Labo-
straight and with uniform bore. The ends of the tube shall be
ratory Apparatus for United States Government Procure-
ground flat, perpendicular to the tube axis and beveled as
ments
specified in Fig. 1.
This specification is under the jurisdiction of ASTM Committee E41 on
6.2 Dimensions—The tube shall be made of tubing with an
Laboratory Apparatus and is the direct responsibility of Subcommittee E41.01 on
outside diameter (OD) of 6.5 6 0.5 mm with an inside
Apparatus
diameter (ID) of 2.55 mm 6 0.15 mm. The uniformity of the
Current edition approved Nov. 1, 2008. Published January 2009. Originally
bore shall be 6 0.1 mm throughout the tube. The tube shall be
approved in 1983. Last previous edition approved in 2003 as E923 – 97 (2003).
DOI: 10.1520/E0923-97R08.
30061mmlongandgroundand beveledateachend.Thetube
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
shall have an inscribed graduated scale extending over the
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
lower 200 6 0.35 mm of the tube. The tube should contain
Standards volume information, refer to the standard’s Document Summary page on
the ASTM website. approximately 1 mL of blood when filled and adjusted to the
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
E923−97 (2008)
FIG. 1 Westergren
...
This document is not anASTM standard and is intended only to provide the user of anASTM standard an indication of what changes have been made to the previous version. Because
it may not be technically possible to adequately depict all changes accurately, ASTM recommends that users consult prior editions as appropriate. In all cases only the current version
of the standard as published by ASTM is to be considered the official document.
Designation:E923–97 (Reapproved 2003) Designation: E 923 – 97 (Reapproved 2008)
Standard Specification for
Glass Westergen Tube, Reusable
This standard is issued under the fixed designation E 923; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. A
superscript epsilon (´) indicates an editorial change since the last revision or reapproval.
1. Scope
1.1 This specification describes requirements for a tube that measures the erythrocyte sedimentation rate (ESR). ESR is the
suspension stability of red cells in diluted, anti-coagulated human blood.
1.1.1 The use of the term “rate” is, strictly speaking, not correct. The test measures the amount of settling of red cells after a
specified time.
1.2 The tubes are used together with a special rack to ensure they remain in a vertical position during the test.
1.3 This specification includes many dimensional requirements that are, for the most part, in agreement with the British
Standards Institution, German Standards Institute, International Committee for Standardization in Haematology, and the National
Committee for Clinical Laboratory Standards publications on Westergren tubes. The clinical procedure using the tube described
in this specification is known as the “Westergren Method.”
1.4 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility
of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory
limitations prior to use.
2. Referenced Documents
2.1 ASTM Standards:
E 438 Specification for Glasses in Laboratory Apparatus
E 920 Specification for Commercially Packaged Laboratory Apparatus
E 921 Specification for Export Packaged Laboratory Apparatus
E 1133 Practice for Performance Testing of Packaged Laboratory Apparatus for United States Government Procurements
E 1157 Specification for Sampling and Testing of Reusable Laboratory Glassware
3. Terminology
3.1 Definitions of Terms Specific to This Standard:
3.1.1 reusable—capable of being used again.
3.1.2 tube—the word “tube” rather than “pipet” is used to describe this instrument. The word “pipet” should be reserved for
volume-measuring instruments thus designated. A tube used for measurements of blood sedimentation rate is not a volume
measuring instrument. In this connection, misunderstanding can occur when a Westergren “tube” is described as a “pipet.”
3.1.3 Westergren—The surname of the individual responsible for the design of the Westergren tube and the method of use.
4. Classification
4.1 This specification covers a tube that is intended to be used until it is no longer considered functional for the purpose
intended. The specification is specifically written for a reusable item and is not to be confused with a disposable tube that is
described in other published standards.
5. Materials
5.1 The tubes made to this specification shall be fabricated from borosilicate glass, Type I, Class B; or soda lime glass, Type
II, in accordance with Specification E 438.
This specification is under the jurisdiction of ASTM Committee E41 on Laboratory Apparatus and is the direct responsibility of Subcommittee E41.01 on Glass
Apparatus.
Current edition approved Nov. 10, 1997. Published February 1998. Originally published as E923–83. Last previous edition E923–93.
This specification is under the jurisdiction of ASTM Committee E41 on Laboratory Apparatus and is the direct responsibility of Subcommittee E41.01 on Apparatus
Current edition approved Nov. 1, 2008. Published January 2009. Originally approved in 1983. Last previous edition approved in 2003 as E 923 – 97 (2003).
Annual Book of ASTM Standards, Vol. 14.02.
For referencedASTM standards, visit theASTM website, www.astm.org, or contactASTM Customer Service at service@astm.org. For Annual Book of ASTM Standards
volume information, refer to the standard’s Document Summary page on the ASTM website.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
E 923 – 97 (2008)
6. Dimensions, Mass, and Permissible Variations
6.1 Design—The Westergren tube shall be made of thick-walled glass tubing. It shall be of one-piece construction, straight and
with uniform bore. The ends of the tube shall be ground flat, perpendicular to the tube axis and beveled as specified in Fig. 1.
6.2 Dimensions—The tube shall be made of tubing with an outside diameter (OD) of 6.5 6 0.5 mm with an inside diam
...
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